But China Glaze's four shades, available in April, aren't the only spray-on polishes that will hit the market soon. If you're looking to get your hands on the innovative product sooner, Nails Inc. announced that their Paint Can line will be available on March 29 for $12. Head to nailsinc.com to get on the wait-list. Or sign up to be notified when Milk Makeup's metallic versions are back in stock at milkmakeup.com.